Thirty women were examined in a hospital by a doctor and the number of heartbeats per
minute were recorded and summarised as follows. Find the mean heartbeats per minute
for these women, choosing a suitable method.
Number of heartbeats per minute:
65-68
68 - 71
71-74
74-77
77-80
80-83
83-86
Number of women:
2.
4
3
8.
7
4
2
If possible , use the direct method to find the mean please !
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~~~Anushikha ♥​